\begin{table}%t1
\caption{\label{tab1}Selected sample.}
\small%\centering
\par
\begin{tabular}{lccccc}
  \hline \hline\noalign{\smallskip}
\multicolumn{1}{c}{Object} &  \multicolumn{1}{c}{RA(2000)} &
\multicolumn{1}{c}{Dec(2000)} & \multicolumn{1}{c}{Lum. ($L_\odot$)} & 
\multicolumn{1}{c}{$d$}  &  \multicolumn{1}{c}{} \\
 \hline\noalign{\smallskip}     
Serpens-FIRS 1    & 18:29:49.6  &   +01:15:20.6 &   33    & 230  & Maps in C$^{17}$O,C$^{18}$O,N$_2$H$^+$ and
N$_2$D$^+$    \\
Cep E-mm          & 23:03:13.1  &   +61:42:26.0 &   100    & 730  & Maps in C$^{17}$O,C$^{18}$O,N$_2$H$^+$ and
N$_2$D$^+$    \\
L1641 S3 MMS 1    & 05:39:55.9  &   $-$07:30:28.0 &  67    & 500  & Strip in C$^{17}$O~and C$^{18}$O,
maps in N$_2$H$^+$ and
N$_2$D$^+$ \\
IC1396N           & 21:40:41.7  &   +58:16:12.8 &  150    & 750  & Maps in C$^{17}$O,C$^{18}$O,N$_2$H$^+$ and
N$_2$D$^+$ \\     
CB3               & 00:28:42.7  &   +56:42:07.1 &  1000    & 2500 & Maps in C$^{17}$O,C$^{18}$O,N$_2$H$^+$ and
N$_2$D$^+$  \\
OMC2-FIR4        &  05:35:26.7  &  $-$05:10:00.5  &   1000  &  450 & Maps in C$^{17}$O,C$^{18}$O,N$_2$H$^+$ and
N$_2$D$^+$   \\   
NGC 7129$-$FIRS 2 & 21:43:01.7 & +66:03:23.6 & 500 & 1250 & Strip in C$^{17}$O, maps in C$^{18}$O,N$_2$H$^+$ and
N$_2$D$^+$  \\
\noalign{\smallskip}    
S140             & 22:19:18. 1 &  +63:18:54.6 &  10$^4$ &  910 &    N$_2$H$^+$ and N$_2$D$^+$ maps    \\
LkH$\alpha$ 234 & 21:43:06.8 & +66:06:54.4   & 500 & 1250 &  Maps in C$^{18}$O,N$_2$H$^+$ and
N$_2$D$^+$ \\
\hline 
\end{tabular}
\end{table}